Massachusetts Route 99

Route 99
Map of eastern Massachusetts with Route 99 highlighted in red
Route information
Length:	6.40 mi (10.30 km)
Major junctions
South end:	Chelsea Street / New Rutherford Avenue in Boston
	US 1 / Route 38 in Boston Route 16 in Everett Route 60 in Malden
North end:	US 1 in Saugus
Location
Counties:	Suffolk, Middlesex, Essex
Highway system
Massachusetts State Highway System Interstate US State ← Route 98 Route 101 →

Route 99 is a north–south state highway in metropolitan Boston.

Route 99 begins at the intersection of New Rutherford Avenue and Chelsea Street, over the northbound tunnel of U.S. Route 1 created during the Big Dig. It continues along New Rutherford Avenue, passing onramps to Route 1 and Bunker Hill Community College before entering Sullivan Square, where Route 38 begins next to the MBTA station. It then turns northeastward onto Alford Street, crossing the Malden Bridge over the Mystic River. After passing through a small strip of Boston on the east banks of the river, the route enters Everett and becomes Broadway.

Broadway crosses through Sweetser Circle, the intersection with Route 16 and the Revere Beach Parkway. The route continues northeastward into the city of Malden, where it intersects Route 60. The route continues on through a short (0.25 miles (0.40 km)) corner of Melrose before entering Saugus. Once in Saugus the route terminates at ramps leading back to Route 1.

The Charlestown Bridge from Boston's North End into Charlestown used to be that starting point of the route; however, the latest GIS data from the Massachusetts Department of Transportation indicates that it is no longer the starting point for Route 99. This probably became the case upon completion of the Big Dig's moving of Route 1.